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Old 05-22-2017, 06:35 PM   #32
Moderator -- Mud Man
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Join Date: Jan 2003
Location: Princeton,Tx.- Dallas area
Posts: 30,483
When you spread thinset on walls, especially with a large notch like you have, it takes a lot of thinset to make solid, continuous notches. Keep plenty of thinset along the edge of the trowel when spreading. Spread upward as much as you can to avoid dropping any thinset. You can spread it sideways but I like to make the final path in a upward motion with extra thinset on the trowel. That will leave solid grooves in the thinset without any skipping or voids. Then skim coat the tiles with the flat side of the trowel.
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